Radiator core



2 Sheets-She'et 1 RADIATOR GORE A. B. MEDVILLE Filed Feb. 13. 1929 Sept. l, 1931. A. e.. MEDvlLLE RADIATOR CORE Filed Feb. 13, 1929 '2 shet's-sheez Patented Sept. 1, 1931 narran stares.`V

ALBERT BENJAMN MEDVILLE, OF CHICAGO, MANUFACTURING COMPANY, F CHICAGO,

ILLINOIS, ASSIGNOR TO AUTO RADIATOR ILLINOIS, A CORPORATION OF ILLINOIS RADIATOR come Application led February 13, 1929. Serial No. 339,522.

This invention relates to cores, and with regard to certain more specific features, to radiator cores for heat transfer purposes such as in cooling systems in automobiles, aeroplanes, refrigerators and the like.

Among the several objects of the invention may be noted the provision of a radiator core having improved air circulating and cooling characteristics and which at the same time is stronger and more rigid, whereby it may be applied with particularly improved re'- sults to the larger sizes of radiators such as are used on trucks, aeroplanes, and the like, where difficult service conditions are encountered. Other objects will be in part'obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of T parts which will be exemplified in thestructure hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings in which is illustrated one of the various possible em'- bodiments of the invention,

Fig. 1 is a plan view ofy a cooling vweb or .tin showing certain improved zigzag depressions or cross ducts for effecting improved 3o air circulation and greater strength;

Fig. 2 is a plan view showing the web of Fig. 1 partially inserted between two joined water retaining walls; Y

Fig. 3 is an end elevation of Fig. 2 but showing the web in final soldered position between the water walls; n*

Fig. shows several assemblies` of joined water walls and enclosed webs such as arel shown in Fig. 3. said assemblies being joined to make up part of a radiator core;

Fig'. 5 is a horizontal sectional view taken substantially online 5-5 'of Fig. 4;

Fig. 6 is a cross section taken substantially on line 66 of Fig. 5; y Fig. 7 is a cross section taken on line 7--7 of Fig. 1; and, Fig. 8 is a cross section taken on line 8-8 of Fig. 1.

5c Similar reference characters indicate corthe webs 1, the water retaining walls 7 Vresponding parts throughout the several views of the drawings.

Referring now more particularly to Fig. 1, vthere is illustrated at numeral 1 a cooling web or iin composed of relatively thin sheet brass, and formed to the shape shown by suitable dies. The shape referred to comprises tortuous edges 3 formed in elevation (see Fig. 3) to effect completion of hexagonal openings 5 when the web 1 is inserted between paired Water retaining walls 7. It may be seen from Fig. 3.y that successive pairs 9 of the water retaining walls 7 are joined by over rolling and crimping also be seen that the edges 13 of each joined pair 9 of water retaining walls 7 are of the same tortuousshape as one another but that they are complementary to the tortuous edge shape of the inter-positioned cooling web 1. so that. the hexagonal .reticulations 5 are formed' for permitting air to enter between the water retaining walls 7 of each joinedy pair 9. It is to be understood that the web edges 3 and water retaining wall edges 13 may also be formed with edges complementing one another to form shapes other than hexagonal shapes.

Fig. 3 shows an assembly of two water retaining walls 7 joined at their ends at said joints 11 and shows an interposed web 1. The web 1 is interposed after the walls 7 have been fastened together at their ends. As illustrated at theright in Fig. 2, each water retaining wall has a body portion 15 formed between the tortuous edges 13 thereof.` Like are formed by suitable dies. The formation of thebody portion 15 of each retaining water wall 7 comprises fluting 17, 19 from the ends of which the edges 13 are slightly offset, kas illustrated inFigs. 2 and 3. Alternate convex Hutes 19 have depressions or interruptions 21 formed therein. whereas theconcave flutes 17 do not. When successive sections. such as illustrated in Fig. 3, are assembled (see Figs. l and 5) an uninterrupted concave flute 17 of one water retaining wall 7 of one section is placed opposite an interrupted convex flute of another water retaining wall 7 of the juxtaposed section, so that at a joint 11. It may to, and others, by combination a continuous water passage 23 is left from top to bottom of a radiator, said passage being positioned between successive sections or pairs 3 of water retaining walls (see Figs. 5 and The passages 23 form tortuous water passages. It is to be understood that each section or pair 9 and the web 1 therein is soldered at the juxtaposed portions of edges 3, 13 and along the seams 11 so as to render them water tight.

Referring again to Figs. l, 2 and 6 to 8, it may be seen that each web 1 compris-es said edges 3 and also a body portion 25 therebetween. Broadly speaking, this body 25 follows in shape the hexagonal convolutions of the edges 3 (see Fig. son of luting 27. However, the top or ridge portion of each flute 27 is arcuately depressed, as illustrated at numerals 29. The depressions 29'are formed on both sides of the web, as are the ridges of the flutes 27. The purpose of the depressions 29 is to provide a substantially great area of arcuate surface contact between the uninterrupted flutes 17 of the water walls and the web or iin 1, so that heat may be conducted fromthe hot water walls 7 to the .veb 1 (see Fig. 6). The depressions 29 are niade to conform 'to the shapes of the iutes 17 so that after the parts have been assembled and soldered at the edges, the proper contact for heat conducting purposes will be had.

I have found that if the webs 1 are made only with iiuting, as above described, and the water retaining walls in the same way, that there is no bracing against stretching of the lengths of metal forming the'webs 1 and/or water walls 7 that is, they may stretch laterally of the flutes, accordion-like. This results in seine weaving under stress applied to the linal structure composing the radiator core, the amount of weave or strain being in some proportion to the increase in radiator size and magnitude of applied stresses. I have also found that itis desirable to laterally or vertically join the air passages (formed through the radiator by the web fluting 27) so that a stacl` eEect is obtained for convecting rising heated air into the cool air passing horizontally through the radiator by way of said web flutes 27. 'At the 'same time the horizontal passage' of the cool air should not be obstructed to any greatdegree.

I accomplish the imgirovements referred with the construction above set out, or zigzag ridges or channels 31, 33 formed laterally across the web flutes 27. The channels o1., form a continuous channel up and down in the lindirected fore and aftvof (the radiator.

The preferred angles for the zieyiao4 channels are-at approximately l5 degrees' with respect to the iiuting, as illustrated in the drawings. It will be seen that wheth-er or not a iiute 27 lished radiator, the zigzagging thereof being This is true by reacomprises a raised portion or a depression depends upon whichv side of the web 1 it is viewed from. Every other flute is a raised one on a given side of the web and all flutes 27 are raised portions on one side or the other of the web. Thus I have found that by pressing down alternate portions 31 of the channels 31, 33 and pressing up on the other side of the portions 33 (Figs. 1 and 7), the depression in each case being less in depth than that ofthe respective flute in which it is made (see Fig. 7), that each flute can be made to communicate with the one above, so that an incipient hot air stack effect is induced in the resulting zigzag channel, as illustrated by the dotted arrows 35 in Fig. 2. The depressions are pressed in by the die which forms the remainder of the web. They may all be formed angularly without necessarily being zigzag. The induced zigzag currents of warm air are intersected by cold air moving laterally through the web liutings 27, as illustrated by the lateral straight arrows shown in F 2. The lines of zigzag channels 31, 33 inav be multiplied in number, as illustrated in Fig. 1, where four are shown, but I have found it preferable that they be not multiplied to such an extent that the heat convecting depressions 29 are reduced in length to less than the widths along the flutes 27) of the channels or back sets 31, 33. This is so that ample arcuate surface contact area is had between the water walls 7 and interposed cooling web 1. for conducting heat (see also Fig. 6) from the water walls 7 to the cooling web or lin 1, from whence it is dissipated by the lateral and cross channel arrangement represented by the channels 31, 33 and lluting The lateral channels 31. 33 serve as stiffening braces across each flute 27 to prevent stretchi-ngof the web 1 as a whole laterally of the luting. Hence a stronger and more rigid construction is effected. The fore and aft zigzag shapes of the channels 31, 33 are more effective than straight shapes, because more turbulence and intermixing of cold and hot air is effected. It will be seen that some cold air is mechanically deflected from the fluting 27 into the lateral channels 31. 33. Thus a forced turbulence or eddy effect is had between the convected hot air and the cold air, whereby more effective cooling is had.

The latticed arrangement of channels, due to the channels 31, 33 crossing the flute channels 27, results in greater strength and better cooling effects. The zigzag latticing introduces the further improvements referred to.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructions without departing from the scope of the invention, it

j is intended that all matter contained in the Vio above v.description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claini:

l. vIn a radiator core a section comprising a web having tortuous edges, joined Water retaining walls having complementary tortuous edges separated by said web, said walls and said web having iluting between edges,

said 'luting and said edges having wave forms of corresponding elevations and depressions, depressions comprising arcuate surfaces in the fluting of the web for engaging certain portions of the iuting of the water retaining walls over substantial areas to conduct heat to the web, the said iluting forming cold air passages, and lateral substantially dat passages forined zigzag fore and aft across said cold air passages, said lateral passages being formed without effecting any opening in said web.

2. In a radiator core a section comprising a web having tortuous edges, joined water retaining walls having complementary tortuous edges separated by said web, said walls and said web having uting between edges, said luting and said edges having wave forms of corresponding elevations and depressions, depressions comprising arcuate surfaces in the fluting oit the web for engaging certain portions of the fluting of the water retaining walls over substantial areas to conduct heat to the web, the said fluting forming cold air passages, and lateral substantially flat passages formed zigzag fore and aft across said cold air passages, said lateral passages having a depth less than that of the web fluting.

3. In a radiator core a section comprising a. web having tortuous edges` joined water retaining walls having complementary tortuous edges separated by said web, said walls and said web having fluting between edges, said fiuting and said edges having wave forms of corresponding elevations and depressions, depressions in the fluting of the web for enging certain portions of the iuting of the water retaining walls over substantial areas to conduct heat to the web, the said fluting forming cold air passages, and lateral sub stantially flat passages formed angularly fore and aft across said cold air passages.

4. In a radiator core a section comprising a web having tortuous edges. joined water 1@taining walls having complementary tortuous edges separated by said web, said walls and said web having uting between edges, said fluting and said edges having wave Jorms of corresponding elevations and depressions, depressions in the luting of the web for engaging certain portions of the fluting of the water retaining walls over substantial areas to conduct heat to the web, the said fluting forming cold air passages and angular, lateral Y substantially flat passages formed across said cold air passages and depressions in the fluting of said walls which are not lengaged by depressions in the web luting, whereby a water passage is eiected'between water retaining walls of contiguous sections.

In testimony whereof, I have signed my naine to this specification this 8th day of February, 1929.

ALBERT BENJAMIN MEDVILLE.r 

